Energy Transport and Nanostructuring of Dielectrics by Femtosecond Laser Pulse Trains
This study analyzes single burst ablation of dielectrics by a femtosecond pulse train that consists of one or multiple pulses. It is found that (1) there exist constant-ablation-depth zones with respect to fluence for one or multiple pulses per train and (2) for the same total fluence per train, although the ablation depth decreases in multiple pulses as compared to that of a single pulse, the depth of the constant-ablation-depth zone decreases. In other words, repeatable structures at the desired smaller nanoscales can be achieved in dielectrics by using the femtosecond pulse train technology, even when the laser fluence is subject to fluctuations. The predicted trends are in agreement with published experimental data.
L. Jiang and H. Tsai, "Energy Transport and Nanostructuring of Dielectrics by Femtosecond Laser Pulse Trains," ASME Journal of Heat Transfer, American Society of Mechanical Engineers (ASME), Jan 2006.
The definitive version is available at http://dx.doi.org/10.1115/1.2241979
Mechanical and Aerospace Engineering
Keywords and Phrases
Dielectric Materials; High-Speed Optical Techniques; Laser Ablation; Nanostructured Materials; Nanotechnology; Reflectivity; Silicon Compounds
Article - Journal
© 2006 American Society of Mechanical Engineers (ASME), All rights reserved.